Tim,
Looking at your site - I have some tips that should definitely improve your conversion. One thing to keep in mind is you can do all of the marketing that you want and get all of the traffic, but if it is not easy to navigate your site or intuitive to purchase, then the sales just won't happen.
I will take a hard look at your site and give you some recommendations a little later today. I am certain there are some simpler things that can be done to help improve your conversion. Just think, if you have 2000 visitors coming to your site a day with a current 0% conversion rate, I think with some simple adjustments, you could bump that up to even a 0.1% conversion rate and you would get about 2 sales a day.
I will be back in a little bit with some more concrete feedback.
Cheers!
Julia